M’s moment of madness

We go for a ride in an X5 fitted with a 700bhp, Le Mans-winning V12 race engine

But we don't really care why it exists, we're just glad it does. And, after seeing it lurking at the back of the garage, we were interested in what it could do round a track. Well, you just would be, wouldn't you? Luckily we had the Nürburgring GP circuit, a DTM driver and access to the car to find out. Rude not to, really.